Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
Factpages Norwegian Offshore Directorate
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22.12.2024 - 01:25
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6507/12-2

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  • General information
    General information
    Attribute Value
    Wellbore name
    Official name of wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    6507/12-2
    Type
    Wellbore type. Legal values: EXPLORATION, DEVELOPMENT, OTHER (see 'Purpose' for more information)
    EXPLORATION
    Purpose
    Final classification of the wellbore.

    Legal values for exploration wellbores:
    WILDCAT, APPRAISAL, WILDCAT-CCS, APPRAISAL-CCS.

    Legal values for development wellbores:
    OBSERVATION, PRODUCTION, INJECTION, INJECTION-CCS, OBSERVATION-CCS.

    Legal values for other wellbores:
    SOIL DRILLING (drilling in connection with track surveys and other subsurface surveys to investigate the soil conditions prior to placement of facilities),
    SHALLOW GAS (drilling to investigate shallow gas before the first 'real' drilling on the location),
    PILOT (drilling to investigate the geology and fluid connectors for location of the main wellbore),
    SCIENTIFIC (drilling according to Law of Scientific research and exploration),
    STRATIGRAPHIC (driling according to Law of Petroleum activities §2-1).
    WILDCAT
    Status
    Status for the wellbore. Legal values are:

    BLOWOUT: A blowout has occurred in the well.
    CLOSED: A development wellbore that has been closed in a shorter or longer periode. Also applies to development wellbores where drilling is completed, but production/injection has not yet been reported.
    DRILLING: The well is in the drilling phase - can be active drilling, logging, testing or plugging,
    JUNKED: The drilling operation has been terminated due to technical problems.
    P&A: Exploration: The well is plugged and abandoned, and can not be reentered for further use. Development wells: The production/injection from/to the well is stopped and the well is plugged. The wellhead is removed or else made unavailable for further well operations.
    PLUGGED: The wellbore has been plugged, but the upper parts of the wellbore can be re-used. A sidetrack might be drilled at a later stage.
    PRODUCING: It was produced from the wellbore at the time of the operators last monthly report to the Norwegian Offshore Directorate.
    INJECTING: It was injected to the wellbore at the time of the operators last monthly report to the Norwegian Offshore Directorate.
    PREDRILLED: The upper part of the well has been drilled, usually as part of a batch-drilling campaign covering several wellbores.
    RE-CLASS TO DEV: Exploration wellbore that is reclassified to a development wellbore.
    RE-CLASS TO TEST: Exploration wellbore that is reclassified to test production.
    SUSPENDED: The drilling operation in the wellbore has been temporarily stopped. The current plan is to continue drilling later on.
    P&A
    Multilateral
    Indicator telling if the parent well is multilateral, meaning it has more than one branch radiating from the main borehole. Example of legal values: YES, NO. See also Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    NO
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    Main area
    Name of the area on the Norwegian Continental Shelf where the wellbore is located. Legal values: BARENTS SEA, NORWEGIAN SEA, NORTH SEA.
    NORWEGIAN SEA
    Well name
    Official name of the parent well for the wellbore based on Norwegian Offshore Directorate guidelines for designation of wells and wellbores.
    6507/12-2
    Production licence
    Official designation of the production licence the wellbore was drilled or planned to be drilled from ( well head posistion).
    Drilling operator
    Name of the licensee starting the drilling operation on behalf of the active production license (well head position). This will usually equal the operator of the production license.
    Saga Petroleum ASA
    Drill permit
    The drilling permit number together with the version of the drilling permit as stated in the drilling permit granted by the Norwegian Offshore Directorate.
    289-L
    Drilling facility
    Norwegian Offshore Directorate's name of the facility which the wellbore was drilled from.
    Drilling days
    Number of days from wellbore entry to wellbore completion.
    169
    Entered date
    The date when he wellbore was spudded. For sidetracks: The date when new formation was drilled by kicking off from the mother-wellbore,
    09.06.1981
    Completed date
    Exploration wellbores from moveable facilities:
    For floating facilities - date when anchor handling is started. For jackups - date the jacking-down started. Exploration wellbores from fixed facilities and all development wellbores:
    Date when the wellbore is at total depth, and last casing, liner or screen is set. In case of immediate plugging of the wellbore, completed date equals the date the last plug i set in the wellbore.
    Date when the wellbore is at total depth, and last casing, liner or screen is set. In case of immediate plugging of the wellbore, completed date equals the date the last plug i set in the wellbore.
    24.11.1981
    Release date
    Date when raw data which has been reported to the authorities from the wellbore is not confidential any longer. Normally 2 years after finishing the drilling. May be earlier if the area of the production license is relinquished.
    24.11.1983
    Publication date
    Date quality control of the wellbore information was completed, so it can be published on the internet as a 'Well Data Summary Sheet' wellbore with more information available than other wellbores.
    29.06.2004
    Purpose - planned
    Pre-drill purpose of the wellbore. Legal values for exploration wellbores: WILDCAT, APPRAISAL, WILDCAT-CCS, APPRAISAL-CCS. Example of legal values for development wellbores: OBSERVATION, PRODUCTION, INJECTION.
    WILDCAT
    Content
    For exploration wellbores, status of discovery.

    Legal values:
    DRY, SHOWS (trace amounts of hydrocarbons), GAS, GAS/CONDENSATE, OIL or OIL/GAS.
    SHOWS (GAS SHOWS, OIL SHOWS or OIL/GAS SHOWS) are detected as fluorescent cut (organic extract), petroleum odour, or visual stain on cuttings or cores, or as increased gas reading on the mud-loggers gas detection equipment.
    Legal values for WILDCAT-CCS and APPRAISAL-CCS: WATER

    For development wellbores, type of produced/injected fluid.
    Legal values:
    WATER, CUTTINGS, NOT AVAILABLE, OIL, GAS/CONDENSATE, OIL/GAS, CO2, GAS, WATER/GAS, NOT APPLICABLE.
    SHOWS
    Discovery wellbore
    Indicator which tells if the wellbore made a new discovery. Legal values: YES, NO. Prior to press-release or other information regarding drilling results, the indicator will be “NO” as a default.
    NO
    Kelly bushing elevation [m]
    Elevation of the rotary kelly bushing (RKB) above mean sea level.
    25.0
    Water depth [m]
    Depth in metres betweem mean sea level and sea floor.
    261.0
    Total depth (MD) [m RKB]
    Total measured length of wellbore from kelly bushing to total depth (driller's depth).
    5008.0
    Bottom hole temperature [°C]
    Estimated temperature at final total depth of the wellbore. Shown only for released wells. See discription.
    152
    Oldest penetrated age
    Age (according to Geologic Time Scale 2004 by F. M. Gradstein, et al. (2004)) of the oldest penetrated formation. May differ from age at TD for example in deviated wellbores. Examples of legal values: CRETACEOUS, EARLY CRETACEOUS, LATE JURASSIC, EARLY PERMIAN, EARLY TRIASSIC, EOCENE.
    MIDDLE TRIASSIC
    Oldest penetrated formation
    Name of the oldest lithostratigraphic unit penetrated by the wellbore. Shown only for released wells. In most wellbores this is formation or group at total depth. May differ from formation or group at TD for example in wellbores drilled with high deviation or through faults. Examples of legal values: AMUNDSEN FM, BALDER FM, BASEMENT, BLODØKS FM, BRYNE FM, BURTON FM, COOK FM, DRAKE FM, DRAUPNE FM, EKOFISK FM, DUNLIN GP.
    RED BEDS (INFORMAL)
    Geodetic datum
    Reference system for coordinates. Example of legal values: ED50.
    ED50
    NS degrees
    Geographic coordinate of the wellhead, north-south degrees.
    65° 11' 48.9'' N
    EW degrees
    Geographic coordinate of the wellhead, east-west degrees.
    7° 51' 35.41'' E
    NS UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, north-south.
    7231064.18
    EW UTM [m]
    Universal Transverse Mercator coordinate of the wellhead, east-west.
    446629.36
    UTM zone
    Universal Transverse Mercator zone. Examples of legal values: 31, 32, 33, 34.
    32
    NPDID wellbore
    Norwegian Offshore Directorate's unique id for the wellbore.
    437

  • Wellbore history
    General
    The purpose of drilling the second exploration well offshore Mid-Norway was to test the whole stratigraphic sequence between the seabed and 5000 m or basement whichever came first, as specified in the licence agreement,
    Vertical closures near base Jurassic, top Lower Triassic, and a possible Permian marker represented the primary targets. Any horizon below the mapped Near Base Jurassic reflector would, according to Saga's interpretation, also be closed and thus represent a possible trap.
    Operations and results
    Well 6507/12-2 was spudded with the semi-submersible installation Byford Dolphin on 9 June 1981 and drilled to TD at 5008 m in the Triassic Red Beds. When pulling out of hole after drilling the 17 1/2" to 1005 m a shallow gas kick was taken. The drill string got stuck m in the 8 1/2 " section at 3620 and could not be freed. The well had to be plugged back and sidetracked from 3347 m. The well was drilled with sea water and gel down to 354 m, with gel/gypsum mud from 354 m to 1005 m, with PAC/polymer/gypsum mud from 1005 m to 2522 m, and with salt saturated lignite mud from 2522 m to TD.
    The well turned out to be dry except for traces of hydrocarbons in a few minor sand-streaks in the Upper Triassic Red Bed sequence. Correlation to the well 6507/12-1 demonstrated generally that all the layers were thinning towards the hinge of the platform. In the Triassic, two significant salt units were encountered, with a total thickness of 800 m, separated by more than 500 m claystones/shales. Two cores were cut. The first was cut from 1929.3 m to 1947.3 m, but nothing was recovered on the rig. The second was cut from 4975 m to 4985 m with 92% recovered. The FIT-samples were attempted through the liner and the 9 5/8" casing at two levels (3010 m and 3002 m), but build up pressure was not achieved. The fluid sample recoveries were respectively 560cc and 550cc, both composed predominantly of mud filtrate.
    The well was permanently abandoned on 26 November 1981 as a dry well with shows.
    Testing
    No drill stem test was performed

  • Cuttings at the Norwegian Offshore Directorate
    Cuttings at the Norwegian Offshore Directorate
    Cuttings available for sampling?
    YES
    Cuttings at the Norwegian Offshore Directorate
    Cutting sample, top depth [m]
    Cutting samples, bottom depth [m]
    360.00
    4449.00

  • Cores at the Norwegian Offshore Directorate
    Cores at the Norwegian Offshore Directorate
    Core sample number
    Core sample - top depth
    Core sample - bottom depth
    Core sample depth - uom
    2
    4975.0
    4984.2
    [m ]
    Cores at the Norwegian Offshore Directorate
    Total core sample length [m]
    9.2
    Cores at the Norwegian Offshore Directorate
    Cores available for sampling?
    YES

  • Core photos
    Core photos
    Core photo at depth: 4975-4980m
    Core photo at depth: 4981-4984m
    Core photo at depth:  
    Core photo at depth:  
    Core photo at depth:  
    4975-4980m
    4981-4984m

  • Casing and leak–off tests
    Casing and leak–off tests
    Casing type
    Casing diam.
    [inch]
    Casing depth
    [m]
    Hole diam.
    [inch]
    Hole depth
    [m]
    LOT/FIT mud eqv.
    [g/cm3]
    Formation test type
    CONDUCTOR
    30
    353.5
    36
    355.0
    0.00
    LOT
    SURF.COND.
    20
    992.0
    26
    1005.0
    1.48
    LOT
    INTERM.
    13 3/8
    2504.0
    17 1/2
    2522.0
    1.70
    LOT
    INTERM.
    9 5/8
    3616.0
    12 1/4
    3633.0
    2.05
    LOT
    LINER
    7
    4551.0
    8 1/2
    4554.0
    2.04
    LOT
    OPEN HOLE
    5008.0
    5 7/8
    5008.0
    0.00
    LOT

  • Logs
    Logs
    Log type
    Log top depth [m]
    Log bottom depth [m]
    BGT
    3347
    3972
    CBL VDL
    287
    2500
    CBL VDL GR
    1350
    3570
    CST
    1513
    2493
    CST
    2505
    3526
    CST
    3550
    4528
    CST
    4788
    5005
    DLL MSFL GR
    3347
    4528
    DLT MSFL GR
    4555
    5003
    FDC CNL GR
    988
    2506
    FDC CNL GR
    3447
    4558
    FIT
    3002
    0
    FIT
    3010
    0
    HDT
    988
    5008
    ISF BHC GR
    988
    2506
    ISF BHC GR
    3347
    5007
    ISF BHC MSFL GR
    2500
    3616
    ISF LSS GR
    345
    1002
    LDT CNL GR
    2500
    3617
    LDT CNL GR
    4555
    5003
    RFT
    1948
    2489
    RFT
    2571
    3290
    VSP/WST
    560
    3561
    VSP/WST
    3323
    5005
    WST
    288
    2502

  • Lithostratigraphy

  • Composite logs
    Composite logs
    Document name
    Document format
    Document size [MB]
    pdf
    1.00

  • Geochemical information

  • Documents – reported by the production licence (period for duty of secrecy expired)
    Documents – reported by the production licence (period for duty of secrecy expired)
    Document name
    Document format
    Document size [MB]
    pdf
    14.56

  • Drilling mud
    Drilling mud
    Depth MD [m]
    Mud weight [g/cm3]
    Visc. [mPa.s]
    Yield point [Pa]
    Mud type
    Date measured
    730
    1.13
    42.0
    water based
    1380
    1.14
    54.0
    water based
    1920
    1.15
    48.0
    water based
    2615
    1.15
    53.0
    water based
    2910
    1.16
    48.0
    water based
    3600
    1.31
    56.0
    water based
    3720
    1.69
    102.0
    water based
    3900
    1.66
    68.0
    water based
    4510
    1.65
    60.0
    water based
    4990
    1.63
    70.0
    water based

  • Palynological slides at the Norwegian Offshore Directorate
    Palynological slides at the Norwegian Offshore Directorate
    Sample depth
    Depth unit
    Sample type
    Laboratory
    1570.0
    [m]
    DC
    OD
    2016.0
    [m]
    SWC
    SNEA
    2023.0
    [m]
    SWC
    SNEA
    2053.0
    [m]
    SWC
    SNEA
    2071.0
    [m]
    SWC
    SNEA
    2104.0
    [m]
    SWC
    SNEA
    2183.0
    [m]
    SWC
    SNEA
    2310.0
    [m]
    SWC
    SNEA
    2351.0
    [m]
    SWC
    SNEA
    2400.0
    [m]
    DC
    OD
    2420.0
    [m]
    DC
    OD
    2440.0
    [m]
    DC
    OD
    2442.0
    [m]
    SWC
    SNEA
    2460.0
    [m]
    DC
    OD
    2480.0
    [m]
    DC
    OD
    2482.0
    [m]
    SWC
    SNEA
    2500.0
    [m]
    DC
    OD
    2520.0
    [m]
    DC
    OD
    2541.0
    [m]
    DC
    OD
    2559.0
    [m]
    DC
    OD
    2589.0
    [m]
    DC
    OD
    2610.0
    [m]
    DC
    OD
    2631.0
    [m]
    DC
    OD
    2652.0
    [m]
    DC
    OD
    2670.0
    [m]
    DC
    OD
    2691.0
    [m]
    DC
    OD
    2709.0
    [m]
    DC
    DC
    2733.0
    [m]
    DC
    OD
    2751.0
    [m]
    DC
    OD
    2769.0
    [m]
    DC
    OD
    2790.0
    [m]
    DC
    OD
    2811.0
    [m]
    DC
    OD
    2829.0
    [m]
    DC
    OD
    2850.0
    [m]
    DC
    OD
    2868.0
    [m]
    DC
    OD
    2889.0
    [m]
    DC
    OD
    2910.0
    [m]
    DC
    OD
    2931.0
    [m]
    DC
    OD
    2949.0
    [m]
    DC
    OD
    2970.0
    [m]
    DC
    OD
    2990.0
    [m]
    SWC
    PAES
    2991.0
    [m]
    DC
    OD
    3009.0
    [m]
    DC
    OD
    3030.0
    [m]
    DC
    OD
    3051.0
    [m]
    DC
    OD
    3069.0
    [m]
    DC
    OD
    3090.0
    [m]
    DC
    OD
    3111.0
    [m]
    DC
    OD
    3127.2
    [m]
    SWC
    PAES
    3129.0
    [m]
    DC
    OD
    3147.0
    [m]
    DC
    OD
    3168.0
    [m]
    DC
    OD
    3189.0
    [m]
    DC
    OD
    3210.0
    [m]
    DC
    OD
    3234.0
    [m]
    DC
    OD
    3252.0
    [m]
    DC
    OD
    3270.0
    [m]
    SWC
    PAES
    3273.0
    [m]
    DC
    OD
    3291.0
    [m]
    DC
    OD
    3305.0
    [m]
    SWC
    PAES
    3307.0
    [m]
    DC
    OD
    3330.0
    [m]
    DC
    OD
    3351.0
    [m]
    DC
    OD
    3360.0
    [m]
    SWC
    PAES
    3369.0
    [m]
    DC
    OD
    3390.0
    [m]
    DC
    OD
    3411.0
    [m]
    DC
    OD
    3429.0
    [m]
    DC
    OD
    3435.0
    [m]
    SWC
    PAES
    3447.5
    [m]
    SWC
    PAES
    3450.0
    [m]
    DC
    OD
    3471.0
    [m]
    DC
    OD
    3476.0
    [m]
    SWC
    PAES
    3489.0
    [m]
    DC
    OD
    3501.0
    [m]
    DC
    OD
    4278.0
    [m]
    SWC
    SNEA
    4526.0
    [m]
    SWC
    SNEA
    4794.0
    [m]
    SWC
    PAES
    4823.0
    [m]
    SWC
    SNEA
    4825.0
    [m]
    SWC
    PAES
    4860.0
    [m]
    SWC
    PAES
    4890.0
    [m]
    SWC
    PAES
    4916.0
    [m]
    SWC
    PAES
    4935.0
    [m]
    SWC
    PAES
    4962.0
    [m]
    SWC
    PAES
    5005.0
    [m]
    SWC
    PAES